🚀 go-pugleaf

Hello,
i'd like to built a parser for HTML tags. But I can only pars links.

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import javax.swing.text.*;
import javax.swing.text.html.*;
import java.util.*;
import java.net.*;
import java.io.*;


public class test{

    public static void main (String[] args){
        String arg = args[0];

        URLConnection conn;
        HTMLEditorKit kit = new HTMLEditorKit();
        Document doc = kit.createDefaultDocument();
        // The Document class does not yet handle charset's properly.
        doc.putProperty("IgnoreCharsetDirective", Boolean.TRUE);
        try{
            URL page = new URL(arg);
            conn = page.openConnection();
            conn.connect();
            InputStreamReader isr = new
InputStreamReader(conn.getInputStream());
            kit.read(isr,doc,0);
            isr.close();
            String link = "doc.length: "+doc.getLength()+"\n\n";
            ElementIterator it = new ElementIterator(doc);
            javax.swing.text.Element elem;
            int i=0;
            while ((elem = it.next()) != null) {
                    SimpleAttributeSet s1 =
(SimpleAttributeSet)elem.getAttributes().getAttribute(HTML.Tag.A);///META,HEAD
etc.
     link = link + s1+"\n";
            }

 System.out.println(link);

        }
        catch(Exception e){
            System.out.println("Error: " +e.toString());
        }
    }

}
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if I put BODY or META instead of A i get null why?

Can you help me?

Harry